Skip to main content
×
Home
    • Aa
    • Aa

Richtmyer–Meshkov instability growth: experiment, simulation and theory

  • RICHARD L. HOLMES (a1), GUY DIMONTE (a2), BRUCE FRYXELL (a3), MICHAEL L. GITTINGS (a1) (a4), JOHN W. GROVE (a1) (a5), MARILYN SCHNEIDER (a2), DAVID H. SHARP (a1), ALEXANDER L. VELIKOVICH (a6), ROBERT P. WEAVER (a1) and QIANG ZHANG (a4)...
Abstract

Richtmyer–Meshkov instability is investigated for negative Atwood number and two-dimensional sinusoidal perturbations by comparing experiments, numerical simulations and analytic theories. The experiments were conducted on the NOVA laser with strong radiatively driven shocks with Mach numbers greater than 10. Three different hydrodynamics codes (RAGE, PROMETHEUS and FronTier) reproduce the amplitude evolution and the gross features in the experiment while the fine-scale features differ in the different numerical techniques. Linearized theories correctly calculate the growth rates at small amplitude and early time, but fail at large amplitude and late time. A nonlinear theory using asymptotic matching between the linear theory and a potential flow model shows much better agreement with the late-time and large-amplitude growth rates found in the experiments and simulations. We vary the incident shock strength and initial perturbation amplitude to study the behaviour of the simulations and theory and to study the effects of compression and nonlinearity.

Copyright
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×
MathJax